Marussia may be on the lookout for a new engine partner under next year’s new turbo regulations. Senior figures from the team confirmed their suspicions that their current engine partner, Cosworth, will withdraw from the sport at the end of the upcoming season.

Having been one of the sport’s longest-standing engine suppliers, Cosworth’s presence in the sport has steadily dwindled in recent years. In 2013, Marussia is the one and only team is supplies on this year’s grid, following the collapse of its other customer, HRT.

In order to seriously consider an engine supply deal under next year’s regulations, Cosworth would require at least three customer teams in order to make the project financially viable.

That appears unlikely to happen, and Marussia sporting director Graeme Lowdon admitted as much when asked about whether or not Cosworth would be preparing a V6 turbo engine for the 2014 season and beyond.

Speaking at a FOTA Fan Forum overnight, Lowdon said: “My understanding is that Cosworth won’t be making a 2014 engine.

“Obviously I don’t work for Cosworth, but that is my understanding. The three suppliers will be Mercedes, Renault and Ferrari.”

Marussia is effectively one of a number of teams on the engine market ahead of the new regulations, with Toro Rosso, Sauber and Force India all reportedly considering a switch of engine suppliers.

While Sauber is most likely to continue its partnership with Ferrari, Force India and Toro Rosso could part ways with their respective engine partners, Mercedes and Ferrari.

Toro Rosso has even gone on the record as much, with team principal Franz Tost recently confirming that he was in negotiations with Renault to secure a customer engine deal with the French engine builder.